Apparatus for projecting loose material



March 9,1926. 1,576,366

B. H. SCHlELDROP APPARATUS FOR PROJECTING LOOSE MATERIAL F'iledAugust 16, 1924 4 Sheets-Sheet I March 9 1926.

' Y B. H. SCHIELDROP APPARATUS FOR PROJECTING LOOSE MATERIAL 4 Sheets-Sheet 2 Filed August 16, 1924 1Z7 NVENTOR March 9 1926.

B. H. SCHIELDROP APPARATUS FOR PROJECTING LOOSE MATERIAL Filed August 16,1924 4 Sheets-Sheet 5 NN MN WNN B. H. SCHIELDROP APPARATUS FOR PROJECTING LOOSE MATERIAL Filed August 16, 1924 4 Sheets-Sheet 4 l VENTOR Patented Mar. 9, 1926.

I "1,576,366 PATENT OFFICE.

IBJ'ABNE H. BCHIELDROP, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO BLAW-KNOX COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW J'FRSEY.

APPARATUS FOR PROJECTING LOOSE MATERIAL.

Applioationfiled August 16, 1924. Serial No. 732,588.

To all whom it may concern:

Be it known that I, BJARNE H. D'CHIEL- DROP, a subject of the King of Norway, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania,'have invented a new and useful Improvement in Apparatus for Projecting Loose Material, of which the following is a full, clear, and exact description.

The present invention relates to apparatus particularly adapted for applying material to furnace linings, although its use is not limited in this respect.

The repairing of furnace linings is a difficult operation because it is not desirable to allow the furnace to get cold before the linings are repaired, and the application of the material to the inside of a red-hot fur nace is not an easy matter. The apparatus of the present invention is capable of discharging a steady stream of dolomite or other material through the open door of a "furnace and across the furnace to the particular points in the furnace lining that need repair.

In the drawings Figure 1 is an end elevation of a preferred embodiment of my invention, showing the same mounted on a truck moving on a track,

Figure 2 is partly a central vertical section and partly an elevation of the structure shown in Figure 1,

Figure 3 is aseotion on the line IIII1I of Figure 2,

Figure 4 is a side elevation of the apparatus removed from the truck,

Figure 5 is a detail view of the means for directing the discharge of the material, and

Figure 6 shows a modification of the means shown in Figure 5.-

In the illustrated embodiment of the invention the reference numeral 2 designates a truck having flanged wheels 3 engaging rails 4. The truck has vertical standards 5 which support a hopper 6 at their upper ends. The hopper is adapted to contain the material 7, such as dolomite, to be applied.

The material applying apparatus proper comprises a suitable base 8 having a turntable 9 mounted thereon to turn on the rollers 10. These rollers are rotatably mounted on the ends of shafts 11 projecting radially from the hub 12 of a vertical spindle 13, the ends of which extend into sockets in the base 8 and tum-table 9. The turn-table has integral parallel sides 14 extending vertical- 1y therefrom, and arranged between the sides is a relatively large pulley 15. This pulley rotates upon a horizontal shaft 16 supported in bearings 17 in the sides 14. Ball bearings l8'are located in recesses in the ends of the hub of the pulley to reduce the friction between the pulley and the shaft. The pulley has a central peripheral groove 19 and engaging the core of the pulley within this groove is a belt 20, which also passes around a smaller pulley 21 rotating on a shaft 22 supported in bearings 23 in the sides 14. The shaft 22 is located above and to the right of the pulley shaft 16 (Figure 2). Another .belt 24 of the same width as that of the pulley 15 has its outer surface in engagement with the peripheral surface of the pul ley 15, said belt s anning the groove 19 and bending around the pulley to engage a substantial arc of its circumference. This belt passes around three other pulleys 25, 26 and 27 of approximately the same diameter as that of the pulley 21. The pulley 25 is mounted upon a shaft 28 located above and to the leftof the pulley shaft 16 (Figure 2) and journaled in bearings 29 in the sides 14. The shaft 28 projects beyond the sides 14 and has a pulley 30 mounted on one end thereof and a disk 31 mounted on its other end. The shaft is adapted to be driven through abelt engaging the pulley 30 or by a motor directly connected to the disk 31. This is aconvenient way of driving the belt 24 and through it the pulley 15 and belt 20, but these elements may be driven in any other suitable manner.

The shaft 32 upon which the pulley 26 rotates is mounted in blocks .33 slidably engaging the edges of slots 34 in extensions 35 of the sides 14. These blocks are adjustable in the slots, to regulate the tension of the belt 24, by means of screws 36. The shaft 32 is located below and to the left of the pulley shaft 16 (Figure 2).

The shaft 37 upon which the pulley 27 rotates is located below and to the right of the pulley shaft 16 (Figure 2) and is carried at one end of a rocking lever consisting of two spaced parallel bell crank arms 38 pivoted upon a shaft 39 supported in bearings 40 in the sides 14. The arms are held upon the projecting end portions of the shaft 39 by' washers 41 and pins 42. The ends of the bell crank arms 38 adjacent the shaft 37 are connected by an integral cross bar 43 and at their other ends they are connected by a hand bar 44. The arms support another transverse bar 45 adjacent the bar 44, from the central portion of which a number of weights 46 are suspended by a bolt 47. The rocking lever is for the purpose of directing the discharge of the material from the belt 24 both vertically and horizontally and the counter-weights 46 are provided to balance the weight of the pulley 27 and other parts carried by the lever.

The material is discharged from the hopper 6 into a chute 48. This chute is located between the sides 14 and between the pulleys 21 and 25 and-is adapted to discharge the material either upon the belt 20 or directly upon the core of the pulley 15 in case the belt is not employed. The smallest cross sectlon of the chute is of considerably greater area than the cross section of the groove 19. The chute has a sliding gate 49 therein adapted to be operated by a handle 50, whereby the size of the discharge opening in the chute may be regulated so as to keep the-groove 19 nearly or completely filled. The auxiliary belt 20 is to be used when it is not possible to fill the groove sufficiently by discharging the material directly onto the core of the pulley. \Vhen the belt 20 is employed the discharge opening in the chute can be made larger and the belt assists in throwing the material falling thereon upon the belt 24 by which it is discharged into the furnace.

The material is carried around in the groove 19 and is discharged from the be t at the point where the belt begins to bend around the pulley 27. It will be apparent that the belt 20 and points on the periphery of the core of the pulley 15 are always moving at a smaller linear velocity than the belt 24. By the time the material has reached the discharge end of the belt 24, however, it has attained the velocity of the belt. By grasping the hand bar 44 the operator can rotate the turn-table so as to direct the.

stream of material leaving the belt 24 in any desired horizontal direction. The path or trajectory of the stream in a vertical plane is, of course, dependent to a large extent aipon the speed of the belt 24. The rocking lever upon which the pulley 27 is carried forms a convenient means for directing the stream to the desired elevation and is far quicker and more dependable in action than adjusting the speed of the belt. It is possible with this apparatus to supply the material in a steady stream and to a relatively restricted area without appreciable scattering of the material upon the furnace bottom.

The shaft 39 upon which the lever arms 38 rock is so positioned between the shafts 32 and 37 that the rocking movement of these arms for directing the stream vertically have no appreciable effect upon the tension of the belt :24. In the modified construction shown in Figure 6 the pulley shaft 37 is carried at one end of bell crank levers 38 and the pulley shaft 32 is carried by extensions 51 projecting from said arms at the angles thereof. The arms have downward extensions 52 whereby they are journaled upon the shaft 39. With this modified construction both of the pulleys 26 and 27 are moved by rocking the lever arms 38" and the shaft 39 is so located with respect to the shafts 32 and 37 that the rocking movements of the arms have substantially no effect upon the tension of the belt 24.

In operating the apparatus, the finer particles of the material and the dust settle' upon the belt 24 and emerge in the bottom of the stream, and as these finer particles and the'dust adhere to the belt with some degree of tenacity the effect is that of having a stream of lumps and beneath it a stream of dust and fine particles. A baffle plate 53 is provided adjacent the pulley 27 to intercept the dust and fine particles which would otherwise be scattered upon the furnace floor. This fine material is directed into a chute 54 which discharges into a box 55 secured to the turn-table by straps 56.

The apparatus is adapted to be moved along in front of a series of open hearth furnaces and to repair the walls of the furnaces through the 'open doors thereof. The apparatus is capable of directing the discharge to any point within the range of speed of the belt 24. It can be employed in the manner described for making front and back dolomite walls in open hearth furnaces, or it may be put to other uses as, for example, loading box cars or handling loose material in places where it is impracticable to place a belt or other kind of conveyor.

While I have shown and described a preferred embodiment of my invention it will be understoodthat changes may be made in the details of construction without departing from the spirit of the invention or scope of the appended claims.

I claim:

1. Apparatus for projecting loose material, comprising a pulley mounted to rotate upon a horizontal axis and having a pcripheral groove, a belt engaging the core of said pulley at the base of said groove, a belt having its outer surface in engagement with the periphery of said pulleyand spanning said groove, said belt being bent around said pulley to engage a substantial arc of its periphery, means for driving said last mentioned belt and rotating said pulley, and means for feeding the material into said groove between said belts at the upper side of said pulley, substantially as described.

2. Apparatus for projecting loose material, comprising a pulley mounted to rotate upon a horizontal axis and having a pcbent around said pulley pulley to engage a substantial arc of its pe-- riphery, means for drivin said last mentioned belt and rotating said Pulley, means for feeding the material into said groove between sa1d belts at the upper side of said pulley, and means for adjusting the discharge end of said last mentioned belt vertically, substantially as described.

3. Apparatus for projecting loose material, comprisinga pulley mounted to rotate upon a horizontal axis and having a pe- =ripheral groove, a belt enga ing. the core of sa1d pulley at the base of said groove, a belt having its outer surface in engagement with the periphery of said pulley and spanning said groove, said belt being bent around said pulley to engage a substantial arc of its periphery, means for driving said last mentioned belt and rotating sa1d pulley, and a chute at the upper side of said pulley for deliverir'ig the material into said oove between said belts, said chute having means for regulating the size of its discharge opening, substantially as described.

4. Apparatus for projecting loose material, comprising a pulley mounted to rotate upon a horizonta axis. and havinga peripheral groove, a belt having its outer surface in engagement with the periphery of said pulley and spanning said groove, said belt being bent around sa1d pulley to engage a substantial arc of its periphery, a support for said pulley and belt rotatable on a vertical axis, and means for adjusting the discharge end of said belt vertically, substantially as described.

, 5. Apparatus for projecting loose material, comprising a pulley mounted to rotate on a horizontal axis and having a eripheral groove, a belt havingits outer sur ace in en gagment with the periphery of said iplley an spanning said groove, said belt eing to engage a substantial arc of its periphery, a rotatable member at the discharge end of said belt around which said belt passes, and abaffle adjacent said rotatable member for intercepting the fine material in the bottom of the stream discharged from said belt, sub-' stantially as described.

6. Apparatus for projecting loose ma? terial, comprising a pulley mounted to rotate on a horizontal axis and having 'a pcripheral groove, a belt having its outer surface in engagement with the periphery of said pulley and spanning said groove, said belt being bent around said pulley to engage a substantial arc of its periphery, a support for said pulley and belt rotatable on a vertical axis, a baflle adjacent the discharge end of the belt. for intercepting thefine material in the bottom of the stream discharged from said. belt, and a receptacle carried by said rotatable su portfor receiving the material intercePtedRJy said bafiie, substantially as described.

7. Apparatus for projecting loose material, comprising a support rotatable on a vertical axis, a pulley carried by said support to rotate on a horizontal axis and havmg a peripheral, groove, a belt havingits outer surface in engagement with the periphery of said pul ey and spanning said groove, a rotatable member having its axis ocated above said pulley and about which said belt engages,- a rotatable member carried b said support and enia ed by an interme iate portion of said e t, means for adjusting said rotatable member to regulate the tensionof the belt, a rotatable member at the discharge end of the belt about which said belt passes, means supporting said lastmentioned member and pivoted to rock on a horizontal axis whereby to adjust the discharge end of the belt vertically without afiectin said first-mentioned rotatable memher, an counter-balance means carried by said rocking means, substantially as described.

In testimony whereof I have hereunto set my hand. 1

BJABNE H. SOHIELDROP, 

